# Destination folder for the downloaded libraries
LIBS_DIR := $(abspath ./libs)

UNAME_S := $(shell uname -s)
# Flags for CGO to find the headers and the shared library
ifeq ($(UNAME_S),Darwin)
	CGO_CFLAGS  := -I$(LIBS_DIR)
	CGO_LDFLAGS := -L$(LIBS_DIR) -lcodex -Wl,-rpath,@executable_path/libs
else
	CGO_CFLAGS  := -I$(LIBS_DIR)
	CGO_LDFLAGS := -L$(LIBS_DIR) -lcodex -Wl,-rpath,$(LIBS_DIR)
endif

ifeq ($(OS),Windows_NT)
  BIN_NAME := example.exe
else
  BIN_NAME := example
endif

# Configuration for fetching the right binary
OS ?= "linux"
ARCH ?= "amd64"
VERSION ?= "v0.0.17"
LATEST_URL := "https://github.com/codex-storage/codex-go-bindings/releases/latest/download/codex-${OS}-${ARCH}.zip"
VERSIONED_URL := "https://github.com/codex-storage/codex-go-bindings/releases/download/$(VERSION)/codex-${OS}-${ARCH}.zip"

all: run

fetch: 
	@echo "Fetching libcodex from GitHub Actions: ${LATEST_URL}"
	curl -fSL --create-dirs -o $(LIBS_DIR)/codex-${OS}-${ARCH}.zip ${LATEST_URL}
	unzip -o -qq $(LIBS_DIR)/codex-${OS}-${ARCH}.zip -d $(LIBS_DIR)
	rm -f $(LIBS_DIR)/*.zip
# Update the path to the shared library on macOS
ifeq ($(UNAME_S),Darwin)
	install_name_tool -id @rpath/libcodex.dylib $(LIBS_DIR)/libcodex.dylib
endif

build:
	CGO_ENABLED=1 CGO_CFLAGS="$(CGO_CFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" go build -o $(BIN_NAME) main.go

ifeq ($(OS),Windows_NT)
PS_CMD := $$env:PATH += ';./libs'; .\$(BIN_NAME)
endif

D = $$

run:
ifeq ($(OS),Windows_NT)
	pwsh -Command "$(D)Env:Path += ';.\libs'; .\$(BIN_NAME)"
else ifeq ($(UNAME_S),Darwin)
# 	Instead of relying on install_name_tool, we can define DYLD_LIBRARY_PATH
#   DYLD_LIBRARY_PATH=$(LIBS_DIR) ./$(BIN_NAME)
	./$(BIN_NAME)
else
	./$(BIN_NAME)
endif

clean:
	rm -f $(BIN_NAME)
	rm -Rf $(LIBS_DIR)/*